<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <el-row :gutter="20">
        <!-- 搜索区域 -->
        <el-col :span="8">
          <el-input placeholder="请输入内容"
                    v-model="queryInfo.query"
                    clearable
                    @clear="getGoodsList">
            <el-button slot="append"
                       icon="el-icon-search"
                       @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <!-- 添加商品区域 -->
        <el-col :span="4">
          <el-button type="primary"
                     @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- 商品列表区域  table表格 -->
      <el-table :data="goodsList"
                border
                stripe
                style="width: 100%">
        <el-table-column type="index"
                         label="#">
        </el-table-column>
        <el-table-column label="商品名称"
                         prop="goods_name">
        </el-table-column>
        <el-table-column label="商品价格(元)"
                         prop="goods_price"
                         width="110px">
        </el-table-column>
        <el-table-column label="商品重量"
                         prop="goods_weight"
                         width="80px">
        </el-table-column>
        <el-table-column label="创建时间"
                         prop="add_time"
                         width="178px">
          <template slot-scope="scope">
            {{scope.row.add_time | dataFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作"
                         width="130px">
          <template slot-scope="scope">
            <el-button type="primary"
                       icon="el-icon-edit"
                       size="mini"></el-button>
            <el-button type="danger"
                       icon="el-icon-delete"
                       size="mini"
                       @click="removeGoodsById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination @size-change="handleSizeChange"
                     @current-change="handleCurrentChange"
                     :current-page="queryInfo.pagenum"
                     :page-sizes="[5, 10, 15, 20]"
                     :page-size="queryInfo.pagesize"
                     layout="total, sizes, prev, pager, next, jumper"
                     :total="total">
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 5
      },
      // 商品数据列表
      goodsList: [],
      // 总商品数量
      total: 0,
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status != 200) {
        return this.$message.error('获取商品列表数据失败！')
      }
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    // 监听 pagesize 的改变,触发该事件
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      // 重新获取数据
      this.getGoodsList()
    },
    // 监听 pagenum 的改变，触发该事件
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 根据商品Id删除指定商品
    async removeGoodsById(goodsId) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 用户取消了删除操作
      if (confirmResult != 'confirm') {
        return this.$message.info('取消了删除！')
      }

      const { data: res } = await this.$http.delete('goods/' + goodsId)
      if (res.meta.status != 200) {
        return this.$message.error('删除商品失败！')
      }
      this.$message.success('删除商品成功！')
      this.getGoodsList()
    },
    // 点击按钮，通过路由跳转到 添加商品页面
    goAddPage() {
      this.$router.push('/goods/add')
    }
  }
};
</script>

<style lang='less' scoped>
</style>
